Lens with interchangeable bayonet

Abstract

Lens with interchangeable bayonet, characterized in that it comprises: a lens body comprising a lens barrel (1) and a connecting barrel (2) fixed as one piece, an axial debug gap (3) being provided between the connecting barrel (2) and the lens barrel (1); a bayonet assembly comprising a solid bayonet tube (4) and a bayonet (5); wherein the one solid bayonet tube (4) is detachably connected to one side of the connection tube (2) via a screw (6), the bayonet (5) is firmly and non-detachably connected to the solid bayonet tube (4), and the bayonet (5) is designed to connect a camera.

Description

Technical area

[0001] The present utility model relates to the technical field of optical lenses, in particular a lens with an interchangeable bayonet. Background technology

[0002] The bayonets of different camera brands differ in design, such as size, flange focal distance, and number of electronic contacts. Therefore, the bayonets of different camera brands are fundamentally not interchangeable. To enable the connection and use of cameras and lenses with different bayonets, manufacturers have developed adapter rings that allow users to attach lenses from one brand to cameras from another, thus expanding the lens selection for photography enthusiasts.

[0003] While adapter rings can achieve a certain degree of physical compatibility between lenses and cameras from different brands, they cannot completely bridge the technological gap between brands. For example, there are significant differences in autofocus, aperture control, image stabilization, lens correction, etc., and the use of adapter rings often involves compromises in these features.

[0004] As in the Fig. 1 and Fig. As shown in Figure 2, a conventional lens includes a lens body (1) and a lens body (2) that are fixed together, and a bayonet (3) is connected to the lens body (1) by screws. When the bayonet (3) and the lens body (1) are fixed together, a gap (4) is preset between the bayonet (3) and the lens body (1) and after that, the bayonet (3) cannot be disassembled (if the bayonet (3) is forcibly disassembled and then reassembled, the gap (4) may change, affecting the pixel quality of the lens). Therefore, conventional lenses do not allow the bayonet to be removed and replaced. In addition, the flange focal length (5) of different bayonets from the imaging surface (6) is different, which also limits the interchangeability of different lens bayonets.

[0005] Therefore, how to realize the interchangeable design of the bayonet on the lens to fit different cameras, and how to replace the bayonet hook without affecting the pixel quality of the lens and causing no impairment or compatibility issues of the lens functionality, is a technical problem that needs to be solved urgently. Contents of the utility model

[0006] Therefore, the technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art, namely that the bayonet on the lens cannot be replaced and adapted to different cameras, and thereby to provide a lens with an interchangeable bayonet.

[0007] To achieve the above-mentioned purpose, the present utility model offers the following technical solutions: Interchangeable bayonet lens including: a lens body including a lens barrel and a mount barrel fixed as one piece, with an axial debug gap provided between the mount barrel and the lens barrel; a bayonet assembly comprising a solid bayonet tube and a bayonet; wherein the one solid bayonet tube is detachably connected to one side of the connection tube via a screw, the bayonet is firmly and non-detachably connected to the solid bayonet tube, and the bayonet is designed to connect a camera.

[0008] In addition, the bayonet assembly also includes a seal and a sealing ring located between the solid bayonet tube and the bayonet.

[0009] In addition, the screw is a Phillips screw exposed on the outer surface of the lens.

[0010] In addition, the bayonet is an E-bayonet, a Z-bayonet, an RF-bayonet or an L-bayonet.

[0011] In addition, the lens barrel is a tube for holding lenses and the connection tube is coaxially attached to the axial end of the lens barrel.

[0012] In addition, a receiving cavity is enclosed between the solid bayonet tube and the lens barrel and the connection tube is located in the receiving cavity.

[0013] In addition, the lens barrel is provided with a stepped structure at the axial end near the bayonet assembly, and the mount barrel is firmly connected to the stepped structure of the lens barrel; the mount barrel includes a mount barrel body fitted over the periphery of the center column of the lens barrel, a first mount edge located at one end of the mount barrel body and extending radially outward, and a second mount edge located at the other end of the mount barrel body and extending radially inward; the first mount edge and the axial end surface of the lens barrel are disposed opposite each other, the first mount edge is fixed to the axial end surface of the lens barrel by screws, and the gap between the first mount edge and the axial end surface of the lens barrel is the axial debug gap;the solid bayonet tube is detachably connected to the second connecting edge by means of screws, and the connection between the solid bayonet tube and the second connecting edge is a rigid connection.;

[0014] In addition, the axial end face of the lens barrel is provided with a limiting structure extending in the bayonet mounting direction, which rests against the outer peripheral wall of the first connecting edge.

[0015] In addition, the solid bayonet barrel includes a mounting barrel mounting portion for attaching the bayonet and a mounting barrel extension portion extending from the mounting barrel mounting portion toward the peripheral edge of the lens body and covering the outside of the mounting barrel.

[0016] In addition, a stepped fitting surface matching the lens barrel is provided at one end of the mounting barrel extension section facing the lens barrel.

[0017] The technical solution of the present utility model has the following advantages: Before the lens leaves the factory, the lens barrel and the mount barrel are fixed as one piece and cannot be disassembled, and the axial debug gap is debugged. When the bayonet on the lens needs to be replaced to adapt to different cameras, only the screws between the locking bayonet mounting barrel and the mount barrel need to be removed, so that the bayonet on the lens can be quickly replaced; and the axial debug gap between the bayonet and the lens body, which must be debugged before leaving the factory in conventional lenses, is moved forward between the lens barrel and the mount barrel. When replacing the bayonet, the bayonet assembly consisting of the bayonet mounting barrel and the bayonet is permanently connected and cannot be disassembled privately.Removing / replacing the bayonet does not affect the debugging effect, ensuring that pixel quality is not compromised by the disassembly and that there are no impairments or compatibility issues with the lens functionality. At the same time, the bayonet exchange also allows the use of lenses with different focal lengths with this lens series. Figures

[0018] To more clearly illustrate the specific embodiments of the present utility model and the technical solutions in the prior art, the figures required for use in the specific embodiments and the description of the prior art are briefly presented below. Obviously, the figures described below represent some embodiments of the present utility model. For general technical personnel in this field, additional figures can be created based on these figures without any creative effort. Fig. 1 is a schematic diagram of the structure of a bayonet of a conventional lens; Fig. 2 is a schematic diagram of the appearance of a conventional lens; Fig. 3 is a schematic diagram showing the structure of an interchangeable bayonet lens in an embodiment of the present utility model; Fig. 4 is a schematic diagram showing the appearance of a lens with an interchangeable bayonet in an embodiment of the present utility model; Fig. 5 is a schematic diagram of the disassembly and assembly of the lens body and the bayonet assembly in the lens with an interchangeable bayonet in an embodiment of the present utility model; Fig. 6 is a schematic illustration of the assembly of the bayonet assembly in an embodiment of the present utility model; Fig. 7 is a schematic diagram of the structure of the bayonet mounting tube in an embodiment of the present utility model; Fig. 8 is a schematic representation of the structure of the bayonet in an embodiment of the present utility model.

[0019] Reference numerals in the figures: 1. Lens barrel; 11. Limiting structure; 2. Mounting barrel; 21. Mounting barrel body; 22. First mounting edge; 23. Second mounting edge; 3. Axial debug gap; 4. Bayonet solid barrel; 41. Mounting barrel mounting portion; 42. Mounting barrel extension portion; 421. Step fitting surface; 5. Bayonet; 6. Screw; 7. Sealing ring; 8. Flange focal length; 9. Imaging surface; 10. Screw. Specific embodiments

[0020] In the following, the technical solutions in the embodiments of the present utility model will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present utility model and not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments that general technical personnel can obtain without creative effort fall within the scope of the present utility model.

[0021] In describing the present utility model, it should be understood that azimuth or positional relationships referring to the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inside," "outside," etc., have the azimuth or positional relationships based on the figures. They are intended to facilitate and simplify the description of the present utility model, rather than to indicate or imply that the said device or component must have a particular orientation, be constructed, and operate in a particular orientation. Therefore, they should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply a relative meaning.

[0022] In the description of the present utility model, the terms "assembly," "connection," and "connection" are to be understood in a broad sense unless expressly stated or limited otherwise. For example, it may be a fixed connection, a detachable connection, or a one-piece connection; it may be a mechanical connection or an electrical connection; it may be a direct connection, an indirect connection via an intermediate medium, or a connection within the two elements. For general technical personnel in the field, the specific meaning of the above terms in the present utility model can be understood depending on the specific circumstances.

[0023] As in the Fig.3 to 8, a lens with an interchangeable bayonet comprises a lens body and a bayonet assembly; the lens body comprises a lens barrel 1 and a connecting barrel 2 which are fixed as one piece, and an axial debug gap 3 is provided between the connecting barrel 2 and the lens barrel 1; the bayonet assembly comprises a solid bayonet barrel 4 and a bayonet 5; the solid bayonet barrel 4 is detachably connected to one side of the connecting barrel 2 by screws 6, the bayonet 5 is fixedly and non-detachably connected to the solid bayonet barrel 4, and the bayonet 5 is adapted to connect a camera.

[0024] In this interchangeable bayonet lens, the lens barrel 1 and mount barrel 2 are fixed as one piece and cannot be disassembled before the lens leaves the factory, and the axial debug gap 3 is debugged. When the bayonet 5 on the lens needs to be replaced to adapt to different cameras, only the screws 6 between the locking bayonet mounting barrel 4 and mount barrel 2 need to be removed, so that the bayonet 5 on the lens can be quickly replaced; and the axial debug gap 3 between the bayonet and the lens body, which must be debugged before leaving the factory in conventional lenses, is moved forward between the lens barrel 1 and mount barrel 2. When replacing the bayonet 5, the bayonet assembly consisting of the bayonet mounting barrel 4 and the bayonet 5 is permanently connected to each other and cannot be disassembled privately.Removing / replacing the 5-megapixel mount does not affect the debugging effect, ensuring that pixel quality is not compromised by the removal and that there are no impairments or compatibility issues with the lens' functionality. At the same time, the bayonet exchange also allows the use of lenses with different focal lengths with this lens series.

[0025] In particular, the bayonet assembly further includes a sealing ring 7 disposed between the solid bayonet barrel 4 and the bayonet 5. By disposing the sealing ring 7, a tight installation of the bayonet 5 on the solid bayonet barrel 4 can be achieved, thereby ensuring the accuracy of the installation position of the bayonet 5. The bayonet assembly consisting of the solid bayonet barrel 4, the sealing ring 7, and the bayonet 5 is non-removable after assembly and replaces the existing bayonet 5. For subsequent replacement, disassembly and disassembly of the bayonet 5 is not required. In particular, the screw 6 is one or more Phillips screws visible on the outer surface of the lens; the user can directly remove one or more Phillips screws and thus replace the entire bayonet assembly to achieve the purpose of bayonet replacement.

[0026] Since the bayonet sizes of different camera brands vary, and the flange focal length 8 of the bayonet 5 from the imaging surface 9 also differs, in order to adapt the interchangeable bayonet lens in the present application to different camera brands, the lens is equipped with four different bayonets 5 and corresponding solid bayonet tubes 4. The four bayonets 5 are E-bayonet, Z-bayonet, RF-bayonet, and L-bayonet to ensure that the lens matches the flange focal length 8 of the corresponding camera after installing the corresponding bayonet 5. In addition, this series of lenses adopts a common bayonet design for different focal lengths (15 mm / 24 mm / 35 mm / 50 mm / 75 mm), which can be interchanged for lenses with different focal length specifications, thereby expanding the user's application range.

[0027] In some embodiments, the lens barrel 1 is a lens mounting tube, and a stepped structure is provided at the axial end of the lens barrel 1 near the bayonet assembly, and the mount barrel 2 is coaxially attached to the stepped structure of the lens barrel 1. The mount barrel 2 includes a mount barrel body 21 fitted over the periphery of the center column of the lens barrel 1, a first mount edge 22 located at one end of the mount barrel body 21 and extending radially outward, and a second mount edge 23 located at the other end of the mount barrel body 21 and extending radially inward. The first mount edge 22 and the axial end face of the lens barrel 1 are opposed to each other, and the gap between the first mount edge 22 and the axial end face of the lens barrel 1 is the axial debug gap 3. A plurality of seals (not shown in figures) are arranged in the axial debug gap 3.The mount tube 2 is secured to the axial end face of the lens barrel 1 by screws 10 that extend through the mount tube 2 and the plurality of gaskets. The bayonet mount tube 4 is detachably connected to the second mount edge 23 by screws 6, with the connection between the bayonet mount tube 4 and the second mount edge 23 being a rigid connection. When assembling the lens barrel 1 and the mount tube 2 before leaving the factory, the axial debug gap 3 can be precisely controlled by adjusting the number and thickness of the gaskets and the locking force of the screws 10, ensuring that the pixel quality of the lens is not affected by disassembling the bayonet assembly.

[0028] Furthermore, a receiving cavity is enclosed between the solid bayonet barrel 4 and the axial end of the lens barrel body 1, and the connection barrel 2 is located in the receiving cavity. Such an arrangement allows for an integrated construction of the connection barrel 2, the screw 10, and the gasket, thereby preventing moisture, dust, etc., from entering the receiving cavity from the outside and impairing the locking action of the screw 10 and the gasket. For example, when the gasket is exposed to air and moisture for a long time, its elasticity changes slightly.This slight change slightly loosens the locking of screw 10, which changes the axial debug gap 3 and impairs the image quality of the lens; the integrated design of the connection tube 2, screw 10, and gasket can largely delay the occurrence of this phenomenon.

[0029] In some embodiments, the axial end surface of the lens barrel 1 is provided with a limiting structure 11 extending toward the bayonet assembly, and the limiting structure 11 rests in a limited manner against the outer peripheral wall of the first connecting edge 22. Furthermore, by providing the upper limiting structure 11 of the lens barrel body 1, the connecting barrel 2 can be prevented from detaching.

[0030] In some embodiments, the fixed bayonet barrel 4 includes a fixing barrel mounting portion 41 for fixing the bayonet 5 and a fixing barrel extension portion 42 extending from the fixing barrel mounting portion 41 toward the outer peripheral edge of the lens barrel body 1 and covering the outside of the connecting barrel 2; the fixing barrel extension portion 42 is provided with a stepped fitting surface 421 that engages the lens body at an end facing the barrel body 1; such an arrangement can further improve the sealing effect of the receiving cavity.

[0031] In summary, the interchangeable bayonet lens provided by the embodiments of the present utility model circumvents the rule that the bayonet cannot be disassembled in the lens bayonet design and realizes the interchangeable bayonet design on the lens, while ensuring that the relative positions of the bayonet and the lens body remain unchanged by separating the connection relationship between the bayonet and the lens body. The pixel quality of the lens is not affected by bayonet replacement, and there are no functional deterioration or compatibility issues.In addition, it has a simple structure, low cost, and high feasibility; moreover, the bayonet and other shared components have a unified design and can be interchanged between lenses with different focal length specifications, thus enabling bayonet interchangeability of this lens series.

[0032] Obviously, the above embodiments are merely examples for clarity of description and do not represent limitations of the embodiments. General technical personnel may make various other forms of changes or modifications based on the above description. An exhaustive list of all embodiments is neither necessary nor possible here. The resulting obvious changes or modifications remain within the scope of the present utility model.

Claims

[1] Lens with interchangeable bayonet, characterized by that it includes: a lens body comprising a lens barrel (1) and a connecting barrel (2) fixed as one piece, an axial debug gap (3) being provided between the connecting barrel (2) and the lens barrel (1); a bayonet assembly comprising a solid bayonet tube (4) and a bayonet (5); wherein the one solid bayonet tube (4) is detachably connected to one side of the connection tube (2) via a screw (6), the bayonet (5) is firmly and non-detachably connected to the solid bayonet tube (4), and the bayonet (5) is designed to connect a camera. [2] Lens with interchangeable bayonet according to claim 1, characterized by that the bayonet assembly further comprises a seal and a sealing ring (7) arranged between the solid bayonet tube (4) and the bayonet (5). [3] Lens with interchangeable bayonet according to claim 1, characterized by that the screw (6) is a Phillips screw exposed on the outer surface of the lens. [4] Lens with interchangeable bayonet according to claim 1, characterized by that the bayonet (5) is an E-bayonet, a Z-bayonet, an RF-bayonet or an L-bayonet. [5] Lens with interchangeable bayonet according to claim 1, characterized by that the lens barrel (1) is a tube for holding lenses and the connection tube (2) is coaxially attached to the axial end of the lens barrel (1). [6] Lens with interchangeable bayonet according to claim 5, characterized by that a receiving cavity is enclosed between the solid bayonet tube (4) and the lens tube (1) and the connecting tube (2) is located in the receiving cavity. [7] Lens with interchangeable bayonet according to claim 6, characterized bythat the lens barrel (1) is provided with a stepped structure at the axial end near the bayonet assembly and the connecting tube (2) is fixedly connected to the stepped structure of the lens barrel (1); that the connecting tube (2) comprises a connecting tube body (21) which is pushed onto the circumference of the center column of the lens barrel (1), a first connecting edge (22) which is located at one end of the connecting tube body (21) and extends radially outwards, and a second connecting edge (23) which is located at the other end of the connecting tube body (21) and extends radially inwards; that the first connecting edge (22) and the axial end face of the lens barrel (1) are arranged opposite one another, the first connecting edge (22) is fastened to the axial end face of the lens barrel (1) by means of screws (10), and the gap between the first connecting edge (22) and the axial end face of the lens barrel (1) is the axial debug gap (3);the solid bayonet tube (4) is detachably connected to the second connecting edge (23) by means of screws (6), and the connection between the solid bayonet tube (5) and the second connecting edge (23) is a rigid connection; [8] Lens with interchangeable bayonet according to claim 7, characterized by that the axial end face of the lens barrel (1) is provided with a limiting structure (11) extending in the bayonet mounting direction, which rests against the outer peripheral wall of the first connecting edge (22). [9] Lens with interchangeable bayonet according to claim 6, characterized by that the solid bayonet barrel (4) comprises a fastening barrel mounting portion (41) for fastening the bayonet (5) and a fastening barrel extension portion (42) which extends from the fastening barrel mounting portion (41) towards the peripheral edge of the lens body and covers the outside of the connecting barrel (2). [10] Lens with interchangeable bayonet according to claim 9, characterized by that a stepped fitting surface (421) matching the lens barrel (1) is provided at an end of the mounting barrel extension section (42) facing the lens barrel (1).

Images